Scale for polygon overlap

Discussion created by lialaporta on May 7, 2014

I am starting to work with ArcGIS after a very basic introduction. I have 4 different layers of polygons that show me different protected areas in my country. I would like to produce a 5th layer (raster), where each cell would return a relative scale of the overlap of the four layers.

Example: a value 4, if all four layers fall in the cell; 3 if only three layers fall in the cell; .... and 0 if no data in cell.

How can I do that? Do I need to convert my layers to raster first? If so, which field value do I choose (do I need to create a new field for that?)

Thanks in advance